make a big thing (out) of
US /meɪk ə bɪɡ θɪŋ (aʊt) əv/
UK /meɪk ə bɪɡ θɪŋ (aʊt) əv/

1.
小題大作, 大驚小怪
to treat something as more important or serious than it really is
:
•
It was just a small mistake, don't make a big thing out of it.
那只是個小錯誤,別小題大作。
•
She tends to make a big thing of every little problem.
她總是喜歡把小問題搞得很大。